* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Paleta de colores moderna y vibrante */
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    
    /* Colores de fondo */
    --bg-color: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-bg: #ffffff;
    
    /* Colores de texto */
    --text-color: #1e293b;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    
    /* Bordes y sombras */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transiciones */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Colores para cards por categoría */
    --color-empresas: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --color-sistemas: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --color-google: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --color-marketing: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background: var(--bg-gradient);
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.header .container {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.logo h1 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo p {
    font-size: 0.875rem;
    opacity: 0.9;
    font-weight: 400;
}

.search-container {
    position: relative;
    flex: 1;
    max-width: 500px;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.search-input:focus {
    outline: none;
    background: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 1rem;
}

/* Navbar */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.8);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    overflow-x: auto;
    scrollbar-width: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: var(--text-color);
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-link:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.nav-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.nav-link.active::before {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px 3px 0 0;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 2.5rem 0;
}

.section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.section-title i {
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Welcome Card */
.welcome-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 2.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.welcome-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
}

.welcome-card h2 {
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    font-size: 2rem;
    font-weight: 700;
}

.welcome-card p {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Quick Access */
.quick-access {
    margin-top: 2rem;
}

.quick-access h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-weight: 600;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.card:hover::before {
    transform: scaleX(1);
}

.card[data-section="empresas"]::before {
    background: var(--color-empresas);
}

.card[data-section="sistemas"]::before {
    background: var(--color-sistemas);
}

.card[data-section="google"]::before {
    background: var(--color-google);
}

.card[data-section="marketing"]::before {
    background: var(--color-marketing);
}

.card i {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card[data-section="empresas"] i {
    background: var(--color-empresas);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card[data-section="sistemas"] i {
    background: var(--color-sistemas);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card[data-section="google"] i {
    background: var(--color-google);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card[data-section="marketing"] i {
    background: var(--color-marketing);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card h4 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Companies Grid */
.companies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.company-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    border-left: 4px solid;
    border-image: var(--color-empresas);
    border-image-slice: 1;
    position: relative;
}

.company-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: transparent;
}

.company-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.company-header h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.company-badge {
    background: var(--color-empresas);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.company-info p {
    margin-bottom: 0.875rem;
    color: var(--text-color);
    line-height: 1.7;
    font-size: 0.95rem;
}

.company-info strong {
    color: var(--text-color);
    display: inline-block;
    min-width: 140px;
    font-weight: 600;
}

/* Resources Grid */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.resource-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.resource-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--bg-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.resource-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.resource-card:hover::before {
    transform: scaleX(1);
}

.resource-card[data-resource="sistema"]::before {
    background: var(--color-sistemas);
}

.resource-card[data-resource="google"]::before {
    background: var(--color-google);
}

.resource-card[data-resource="marketing"]::before {
    background: var(--color-marketing);
}

.resource-card.hidden {
    display: none;
}

.resource-card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.resource-card[data-resource="sistema"] i {
    background: var(--color-sistemas);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.resource-card[data-resource="google"] i {
    background: var(--color-google);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.resource-card[data-resource="marketing"] i {
    background: var(--color-marketing);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.resource-card h4 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.resource-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    flex-grow: 1;
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: 10px;
    transition: var(--transition);
    border: 2px solid var(--primary-color);
    font-size: 0.9rem;
}

.resource-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Footer */
.footer {
    background: var(--text-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

/* Search Results Highlight */
.highlight {
    background: linear-gradient(120deg, #fef08a 0%, #fde047 100%);
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
}

/* Login Screen */
.login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-gradient);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 2rem;
}

.login-card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-xl);
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
}

.login-header {
    margin-bottom: 2rem;
}

.login-header i {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header h1 {
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.login-header p {
    color: var(--text-light);
    font-size: 1rem;
}

.login-content h2 {
    color: var(--text-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.login-content > p {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.login-error {
    margin-top: 1rem;
    padding: 0.875rem;
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #dc2626;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    border: 1px solid #fca5a5;
}

/* User Info en Header */
.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-details {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-sm);
}

.user-name {
    font-size: 0.95rem;
    font-weight: 500;
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.logout-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

/* Estilos para el botón de Google Sign-In */
#g_id_onload,
.g_id_signin {
    display: flex;
    justify-content: center;
    margin: 1rem 0;
}

/* Responsive */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        text-align: center;
    }

    .search-container {
        max-width: 100%;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .nav-menu {
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
    }

    .nav-link {
        padding: 1rem;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .cards-grid,
    .companies-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }

    .welcome-card {
        padding: 2rem 1.5rem;
    }

    .welcome-card h2 {
        font-size: 1.5rem;
    }

    .login-container {
        padding: 1rem;
    }

    .login-card {
        padding: 2rem 1.5rem;
    }

    .login-header i {
        font-size: 2.5rem;
    }

    .login-header h1 {
        font-size: 1.5rem;
    }

    .header .container {
        flex-direction: column;
    }

    .user-info {
        width: 100%;
        justify-content: center;
        margin-top: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .main-content {
        padding: 1.5rem 0;
    }

    .company-info strong {
        display: block;
        margin-bottom: 0.25rem;
    }

    .welcome-card {
        padding: 1.5rem;
    }
}